Scientists were selectively breeding the foxes to be tame but suddenly found their tamest foxes had developed many of the traits found in dogs-- such as droopy ears, strange coat colors, decreased skull size in comparison to the wild-type, a decrease in tooth size and an overall reduction of the entire masticatory bone structure.

The guinea-pig has teeth which are shed before it is born, and hence can never subserve the masticatory purpose for which they seem contrived, and, in like manner, the female dugong has tusks which never cut the gum.

One of the bums had his right arm put out of joint, and the other his upper jaw-bone or mandibule dislocated so that it hid half his chin, with a denudation of the uvula, and sad loss of the molar, masticatory, and canine teeth.